In order to use ffmpeg in android , I tried to build ffmpeg by using build_libstagefright in ffmpeg/tools/lib_stagefright but it alwalys appear a error which i coundn't solve it. the message in the bottom of ffmpeg/config.log is arm-linux-androideabi-g++ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -I../android-source/frameworks/base/include -I../android-source/system/core/include -I../android-source/frameworks/base/media/libstagefright -I../android-source/frameworks/base/include/media/stagefright/openmax -I/home/user/android-ndk/sources/cxx-stl/gnu-libstdc++/include -I/home/user/android-ndk/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon -march=armv7-a -std=c99 -fomit-frame-pointer -fPIC -marm -Wno-multichar -fno-exceptions -fno-rtti -D__STDC_CONSTANT_MACROS -c -o /tmp/ffconf.6ZzEMs87.o /tmp/ffconf.5jbfvJxK.cpp ./configure: line 701: /home/user/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++: cannot execute binary file ERROR: libstagefright_h264 not found my Build Environment is 1. Window 7 2. Cygwin 3. android-NDK-r8b linux version Tom